Metallic grinding-ring



UNTTED STATES PATENT OEETCE.

JOHN G. MOLE, OF BATAVIA, ILLINOIS.

METALLIC GRlNDlNGl-RING.

SPECIFICATION forming part of LettersAPatent No. 321,045, dated June 30, 1885.

Application filed March 3, 1885. (No model.)

.To all whom it may concern:

Be it known that I, JOHN Gr. MOLE, of Batavia, county of Kane, and State of Illinois, have invented certain new and useful Improve ments l,in Metallic Grinding-Rings, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference being had to the accompanying drawings, forming a part of this specification.

The object of this invention is to provide a grinding-ring having a peculiar dress, whereby the substance being ground is uniformly fed to the grinding-teeth and gradually reduced to the required degree of neness as it passes from the eye to the skirt, enabling. the work to be done with less power and imparting a much greater capacity to a grinding-mill, as well as preventing clogging and heating.

Figure l is a plan or face view of a portion of a ring embodying my improved features. Fig. 2 is an edge view of companion-rings forming a set, showing the furrows between the teeth opposite each other; Fig. 3, a sectional detail, showing both rings in the plane y y, Fig. l; Fig. 4, a transverse section in the plane x, Fig. l.

Referring to the drawings, A A represent the two companion grinding-rings forming a pair, the peculiar dress and shape of the furrows between the grinding-teeth being illus trated in several igures of the drawings.

The series of short ridges B are arranged at regular intervals in the eye of Ithe ring. Between these rst ridges are the longer ridges a, arranged in groups and running from the eye to a point midway between the eye and the skirt.

The third series of ridges or grinding-teeth C begin where the ridges a, terminate and extend to the skirt, as shown in Fig. 1. It will be observed that the ridges a are not all of the same length, the length of the grindingteeth O alternating in a corresponding manner. This form of dress serves to distribute the substance uniformly over the grindingsurface,and thus prevents clogging, The several series of ridges are arranged in circles having the eye for the common center.

The series of furrows or planes I) between the grindingteetli O do not present a flat surface, but are beveled, so that the lowest part of the furrows is at the back of the teeth, in accordance with the direction in which the ring revolves. ward in the direction of the grinding side or face of the teeth, and this feature, in connection with the centrifugal force developed, causes a uniform feed and distributes the sub stance being ground equally alike to all the grinding-teeth and prevents choking or clog ging in the furrows. The furrows also have a beveled plane longitudinally, rising gradually from the starting-point to the skirt, as shown in Fig. 4.

By this arrangement the depth of the furrow is diminishedin the direction of the skirt, Fig. 2 showing the lesser and Fig. 3 the greater depth. These :figures also show the oblique angles of the furrows relative to the axial line.

The operation of this form of dress is such that thesubstance being ground is kept in constant motion and subjected to a continuous grinding process, instead of being merely crushed or broken, as is thecase: where the grinding-teeth are set on a flat surface.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A grinding-ring having the furrows on the working-face gradually diminishing in depth as they approach the skirt and faces of the grinding-teeth, the grinding-teeth O, the ridges B, and the series or groups of ridges a, substantially as described.

JOHN G. MOLE.

Vitnesses:

L. M. FREEMAN, L. B. CoUrLAND.

This forms a rising plane upf 

